As TVs grow, so do electric bills

"With the trend toward larger and larger TVs, these displays could use more power, depending on the technology they employ," Fanara says. "So it makes sense for the [EPA] to write new specs that recognize the most efficient products in the marketplace so consumers can at least address the energy consumption in the buying equation."

Electricity use doesn't always register with TV shoppers. Just ask Stephen Baldridge of Providence Village, Texas. When he and his wife, Hollie, bought a big-screen TV last year, they never thought twice about how much energy it would use. And they still don't worry about it. Electric bills don't seem much higher, says Mr. Baldridge, a self-professed "big TV watcher" at about five hours a day. Still, he'd like television manufacturers to keep power consumption to a minimum. "It would be nice if [manufacturers] could do that and keep the electric bill down for us," he says.

America needs a new way to measure the energy efficiency of television sets.

Currently, federal standards measure only a set's "standby mode," when the TV is idle, even though "active mode" accounts for 80 to 95 percent of its annual energy use. This can lead to some confusing results. A television that earns the government's Energy Star rating for its efficiency in standby mode might draw more power in active mode than another model that didn't earn the label.

Including active mode is definitely on the agenda for revising Energy Star standards, says Andrew Fanara, team leader of the program for the US Environmental Protection Agency (EPA). But how to test it is a complex question.

The only nationally recognized active-mode test is the US Department of Energy's nearly three-decades-old process for black-and-white models. It uses a static black-and-white display pattern - even though power consumption in today's models varies widely depending on the activity and intensity of colors displayed on screen.

In its testing of big-screen TVs, the Natural Resources Defense Council (NRDC) used a two-minute clip of the hit comedy "Shrek." The results showed considerable variation in power use. Even similar size TVs could consume "drastically different amounts of power" in active mode, the report says. One 50-inch plasma high-definition TV (HDTV) was estimated to use 679 kilowatt-hours of electricity per year. A 32-inch liquid-crystal display with HDTV capability was pegged at 387 kWh per year. By contrast, an older analog 34-inch TV was estimated to use just 209 kWh per year, NRDC tests found.

The NRDC's Noah Horowitz hopes the EPA will create a single annual energy-consumption number for TVs, much like those found on today's refrigerators or hot-water heaters. He'd also like the agency to set mandatory minimum-efficiency standards for cable and satellite set-top boxes. These boxes could use more than 20 billion kWh per year, at a cost of about $2 billion, another NRDC study says. In that scenario, five 500-megawatt power plants would be needed to run these boxes, emitting 15 million tons per year of carbon dioxide, a global-warming pollutant.

While embracing voluntary Energy Star standards, industry officials disagree with the idea of mandatory efficiency standards. "When an arbitrary standard is placed on a product, it will constrain use and innovation," says Douglas Johnson, senior director of technology policy at the Consumer Electronics Association.

The average US household used 10,656 kilowatt-hours of electricity in 2001. What used the most?

• Air-conditioning 16%

• Refrigerator 14

• Space heating 10

• Water heater 9

• Lighting 9

• Clothes dryer 6%

• Freezer 4

• Furnace fan 3

• Electric range top 3

Source: US Energy Information Administration

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